Front

Particles in an atom that are neutral and have no charge are

Back

Neutrons

Front

All matter is made of what?

Back

Atoms

Front

The central region of an atom where its neutrons and protons are is its

Back

Nucleus

Front

Two atoms of the same element but with different mass numbers are called

Back

Isotopes

Front

What is an ion?

Back

An atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

What is the charge of a proton?

Back

Positive (+)

Front

What is the charge of an electron?

Back

Negative (-)

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is an electron cloud?

Back

The region around the nucleus where electrons are likely to be found.